Malicious PDF — malware analysis report

Static analysis result for SHA-256 92cc08568ad2e4ef…

MALICIOUS

PDF

83.2 KB Created: 2021-04-14 07:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fc6785938e99dddf22f59ee0026da9b SHA-1: 50ff431da9da13cd0ee91ba5ff3abb7a5a29322e SHA-256: 92cc08568ad2e4ef34e3f63bf1ab7cdba94ef11dcfa5d38a139e10e91f6a4594
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm on disposable hosting. The document body, though heavily obfuscated, contains references to 'Symbols in culture pdf' and 'wkhtmltopdf', suggesting a lure. The embedded URLs likely lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jumiwimov.ru/strik?utm_term=symbols+in+culture+pdf
    • https://cdn.sqhk.co/zoluxoni/hchbHje/wudiro.pdf
    • http://komaxinatobofe.medianewsonline.com/beethoven_sonata_19.pdf
    • http://silver35.ru/how_to_crochet_a_beanie_patternj5ia7.pdf
    • http://kapovulup.mywebcommunity.org/94023528201.pdf
    • http://budofibo.mygamesonline.org/analytical_chemistry_christian.pdf
    • https://cdn.sqhk.co/pidodalatip/4Ijjjcm/microsoft_certified_azure_administrator_salary.pdf
    • http://ranupila.mywebcommunity.org/aix_5._3_command_reference.pdf
    • https://cdn.sqhk.co/ratufewebu/gifFhbu/harvard_business_review_case_studies_free.pdf
    • https://cdn.sqhk.co/mujexoxa/jjnjaij/fuvexunifudolijedalinel.pdf
    • http://study-english-04.space/260899513139j6k4.pdf
    • http://sikutamilom.iblogger.org/what_is_the_meaning_of_argumentative_speech.pdf
    • http://f1l3download.site/does_apple_support_ipod_nanoq5sol.pdf
    • http://vomimaforotagi.mywebcommunity.org/apa_ethical_guidelines_for_research.pdf
    • http://lewuvumo.sportsontheweb.net/bangla_golper_boi_file_download.pdf
    • http://canonsburglake.org/vuridagutazonhfdo.pdf
    • http://fibaxoxadomi.sportsontheweb.net/51381111268.pdf
    • http://skout.tech/did_they_stop_making_ps_vita_games77mz6.pdf
    • http://pitowiragomiwa.22web.org/path_of_exile_uber_atziri_guide.pdf
    • http://xizugef.medianewsonline.com/11451077297.pdf
    • http://vezuvujuwe.iblogger.org/velosuvutirifikute.pdf
    • http://bekopomulasebi.getenjoyment.net/mathematics_grade_12_download.pdf
    • http://fuvesozufinefi.medianewsonline.com/93389706978.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://muzokezebo.rf.gd/pakorufamowiluwejirus.pdf
    • http://jisijuvod.myartsonline.com/97726567.pdf
    • http://zijedan.atwebpages.com/apa_itu_arbitrase.pdf
    • http://fixidil.atwebpages.com/wings_of_fire_book_3_free.pdf
    • http://wizigipixe.atwebpages.com/broadbent_s_filter_model.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6f9.bin
b954b602e052244bdbf262617be30c7a805e3ef15ca5c7a6ea20700dc53075b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 5316 bytes
font_01_sfnt_off000108f0.bin
99a1d5b834e82cbba16c76558721a51ea639110e3a72e336307c6d96f1cbe4dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108F0 11364 bytes
font_02_sfnt_off00012f85.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F85 4324 bytes

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